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Add 30/70 and 75/80

30/70 + 75/80 is 153/112.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    30/70 = 30 × 8/70 × 8 = 240/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    75/80 = 75 × 7/80 × 7 = 525/560
  4. Add the two like fractions:
    240/560 + 525/560 = 240 + 525/560 = 765/560
  5. 765/560 simplified gives 153/112
  6. So, 30/70 + 75/80 = 153/112
    In mixed form: 141/112

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